Pressure-regulator for hydrostatic presses



(No Model-) 0. WINDBIEL & J. FIRTH.

PRESSURE REGULATOR FOR HYDROSTATIG PRESSES. No. 259,350. Patented June 13, 1882,.

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CHARLES WINDBIEL AND JAMES FIRTH, OF AMSTERDAM, NEW YORK.

PRESSURE-REGULATOR FOR HYDROSTATIC PRESSES.

SPECIFICATION forming part of Letters Patent No. 259,350, dated June 13, 1882.

Application filed February 23, 1882. (N0 model.)

1'0 (il l whom it may concern Be it known that we, CHARLES VVINDBIEL and JAMES FIRTH, both of Amsterdam, in the county of Montgomery and State of New York, have invented certain new and useful Improvements in PressureRegul-ators for Hydrostatic Presses, of which the following is a speci fication.

Our invention relates to an automatic device for regulating the pressure in hydrostatic presses by controlling the action of the supplypumps for such presses; and the object of our im provement is to provide adevice by which the supply-pumps will be automatically put in motion whenever, by reason ofleakage or any other cause, the pressure in the hydrostatic press or presses becomes reduced below the required standard. This object we attain by means of the mechanism illustrated in the accompanying drawings, which form part of this specification, and in which- Figure 1 is a side elevation of the supplypumps and regulating mechanism, a portion of the frame for the pumps being broken away to expose the underlying parts; Fig.2, a plan view of the same, and Fig. 3 a front elevation of the auxiliary cylinder and its attached parts composing the pressure-regulator.

As illustrated in the drawings, A indicates a double-actin g supply-pump for forcing water or other liquids into a hydrostatic press or presses for the purpose of producing the required degree of pressure in said press. Said pump is provided with the induction-pipes a, leading into the supply-tank B.

O is the driving-shaft, to which the pulley c is secured; D, a slack drivingbelt running from the pulleyc to the pulley E, which revolves freely on the shaft F. A pinion, e, is

attached to the pulley E in such manner that the said pulley and pinion will revolve as one piece on the shaft F, and the said pinion gears into the wheel G, secured to the shaft H, which carries the pinions h, that gear into the wheels 4 5 f, secured to the shaft F, for the purpose of imparting a rotatory motion to the latter.

J is an eccentric secured to the shaft F, and provided with aforked connecting-rod, j, which is jointed to the yoke K, which carries the plungers a for the pump. A reciprocating motion is imparted to the plungers a in the following manner: The shaft 0 is rotated at any required rate of speed for producing the proper number of strokes of the pump-plungers a. Then,when the belt D is drawn tight in the manner hereinafter described, the pulley E and pinion 0 will be rotated to set in motion the wheel G and shaft H, whose pinions h, through the wheels f, cause the shaft F to revolve, and thus impart the necessary motion to the eccentric J to reciprocate the pump-plungers a.

The pumpA and its operating mechanism, as above described, are well known, and do not constitute any part of our invention, and we wish to have it distinctly understood that any other pump-operatin g mechanism may be substituted therefor when preferred.

Our pressure-regulating device consists of an auxiliary cylinder, L, adapted to receive a water-tight working plunger, 1, to which a weight, M, is attached by means of the crosshead L and side rods, 1 or in any other suitable manner, so that the said weight will lie either above or below the cylinder L. A yoke, N, is secured to the side rods, P, or other part of the device that partakes of the motion of the plunger I. Said yoke is provided with an opening, a, through which passes an arm, 0, pivoted at 0, and provided at its swinging end with a tightener-pulley, P, which is adapted to bear against the driving-belt D to produce the required degree of adhesion of the said belt to the pulleys c and E. The delivery-pipe Q from the pump A connects with a cross-pipe, B, one limb of which is attached to the cylinder L to force the water into said cylinder be neath the plunger 1, and the other limb of the pipe R is connected to the way-block S, from which lead the feed-pipes s to the hydrostatic presses, and each of said feed-pipes is provided with the usual stop-valves, s, for shutting off the flow of water through the said pipes, or either of them, when itis required to throw one or more of the presses out of operation.

The operation of our pressure-regulator is as follows: The plunger l is loaded with any weight, M, that is sufficient to resist the pressure exerted by the liquid against the lower end of said plunger to move it (the plunger) IOU upward and to overcome such lifting-pressure until the prescribed maximum pressure is obtained. hen the pump A is started it forces the liquid through the pipes Q and B into the cylinder L and through the way-block S into the hydrostatic press or presses. Now, it is obvious that under such conditions an equal pressure per square inch will be obtained at the same moment in all the presses, in all the pipes leading from the pump, and against the under side of the plunger Z; but the latter remains stationary, and permits the tightener pulley P to bear against the belt D to keep the pump A in operation until the maximum pressure is attained, and then the plunger Z will be forced upward, and thereby the yoke for the weight M on the plunger Zof our regulator.

YVe claim as our invention 1. A pressure regulator for hydrostatic presses, com posed of an auxiliary cylinder containing a movable plunger controlled by means of a weight or spring, in combination with and operating the connecting and disconnecting devices of the pump-driving mechanism, as herein set forth, the said auxiliary cylinder being connected to thet'eed-pipes for thepresses in such manner that the same pressure will be found in the said cylinder and feed-pipes for the purpose of maintaining the pressure in a hydrostatic press or presses at the maximum point of pressure, as herein specified.

2. The auxiliary cylinder L, provided with a weight or spring governed plunger, Z, adapted to automatically connect and disconnect the operating mechanism of the supply-pump for hydrostatic presses, in the manner and for the purpose herein specified.

CHARLES \VINDBIEL. JAMES FIRTH.

Witnesses:

JAS. H. HURST, ED HANLEY. 

